Focus Adjustment; Neck Assy Twist Adjustment - Sony TRINITRON KV-ES38M31 Service Manual

KV-ES38M31/ES38M61/ES38M90/ES38M91
(3) Screen-corner Convergence
b
a-d : screen-corner
c
Fix a Permalloy assy corresponding to the misconverged
areas.
a
d
Permalloy assembly
RM-916
a
misconvergence
d
b
c

5-3. FOCUS ADJUSTMENT

Note
Focus adjustment should be completed before W/B adjustment.
(1) Receive digital monoscope pattern.
(2) Set "A/V CONTROL" to "STANDARD".
(3) Adjust FOCUS VR so that the center of the screen becomes
justfocus.
(4) Change the receiving signal to white pattern and blue back.
(5) Confirm MAGENTA RING should not be over the limit
sample. In case MAGENTA RING is over the limit sample,
adjust FOCUS VR to take tracking of MAGENTA RING
and FOCUS.
Focus
FLYBACK TRANSFORMER (T6803)

5-4. NECK ASSY TWIST ADJUSTMENT

(1) Receive dot/hatch pattern.
(2) Turn FOCUS VR fully counter-clockwise.
(3) Confirm the dot shape at the screen center. (Fig. 5-4)
(4) Resume FOCUS VR.
Note
In case of turning NECK ASSY, loosen the screw 3 turns. Do not
move the position.
OK
Turn NECK ASSY clockwise.
Turn NECK ASSY counter clockwise.
– 44 –
Screen
(No Function)
Fig. 5-4